{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T17:05:57.067Z","years_from_j2000":26.654,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"hd-32301","name":"102 ι Tau","class":"a7v_white_main_sequence_star","category":"star","object_type":"A7V white main-sequence star","mag":4.62,"mag_band":"V","abs_mag":1,"abs_mag_band":"V","distance_ly":172.75231317782803,"distance_method":"parallax","ra_deg":75.77394,"dec_deg":21.589962,"epoch_ra_deg":76.175642,"epoch_dec_deg":21.628119,"epoch_moved_arcsec":2.136,"pm_ra_mas_yr":68.94,"pm_dec_mas_yr":-40.85,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-32301","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"05031+2135","age_years":781876500,"companions":[{"measured":1956,"magnitude":5.4,"components":null,"discoverer_code":"OCC 230","separation_arcsec":0.1,"position_angle_deg":-1}],"mass_solar":2.15,"radius_solar":3.225,"spectral_type":"A7V","color_index_bv":0.155,"luminosity_solar":34.673685045253166,"radial_velocity_km_s":41,"spectral_type_source":"SIMBAD (1969AJ.....74..375C, quality C)","surface_gravity_log_g":3.694,"surface_temperature_k":7899,"proper_motion_ra_mas_yr":68.94,"proper_motion_dec_mas_yr":-40.85,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate","bolometric_luminosity_solar":32.8592},"designations":[{"catalog":"Bayer/Flamsteed","designation":"102 Iota Tau"},{"catalog":"HD","designation":"HD 32301"},{"catalog":"HIP","designation":"HIP 23497"},{"catalog":"HR","designation":"HR 1620"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T16:03:54.983Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}